Prism Binoculars

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This is an aluminum instrument with black finish. The barrels are covered with black leather. The objective lenses are 30 mm diameter. The eye end of the left prism housing is marked “MILITARY STEREO / 6 X 30” and “5409-1942.” That on the right is marked “BAUSCH & LOMB OPTICAL CO. / ROCHESTER, N.Y. U.S.A.” and “DALE BROWN.” Each eyepiece can be focused, and each has a diopter scale. The case is brown leather. A tag in the accession file indicates that this instrument was in the U.S. Naval Observatory repair shop in 1944.
Currently not on view
date made
ca 1940
Bausch & Lomb
place made
United States: New York, Rochester
closed: 2 7/16 in x 6 1/2 in x 4 3/32 in; 6.1976 cm x 16.51 cm x 10.3886 cm
overall in case: 5 3/16 in x 7 in x 3 3/16 in; 13.17625 cm x 17.78 cm x 8.09625 cm
ID Number
catalog number
accession number
Credit Line
Sally Ann Brown, in memory of Capt. Dale Brown
World War II
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Medicine and Science: Physical Sciences
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Data Source
National Museum of American History


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